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Lapsed, fee not paid

Method for fabricating flattened tube finned heat exchanger

US 9,901,966 B2 · Assignee: CARRIER CORPORATION · Inventors: Taras; Michael F. et al.

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Overview

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Why it's free to use

  • The USPTO Official Gazette of April 28, 2026 lists it as expired on February 27, 2026 for an unpaid maintenance fee.
  • It isn't on any reinstatement notice published since.
  • Its 1 US relative has also lapsed, expired or never issued.
  • We check US rights only. Check foreign counterparts before selling abroad.
FiledJanuary 29, 2013
GrantedFebruary 27, 2018
Expired (fee)February 27, 2026
Application number14/376205
Classification (CPC)F28D1/05391 +7 more
Length15 pages

Drawings 6

The 6 drawing sheets are on the way. Every sheet is in the USPTO PDF.

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Claims

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Description

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Timeline & family

Timeline From USPTO dates

2013201520172019202120232025Earliest priority dateFeb 2, 2012Application filedJan 29, 2013Application publishedJan 1, 2015Patent grantedFeb 27, 20183.5-year fee paidAug 27, 20217.5-year fee not paidAug 27, 2025Patent expiredFeb 27, 2026

Maintenance fees

Fees are due 3.5, 7.5 and 11.5 years after grant. This patent expired on February 27, 2026, so the fee marked "not paid" was the one that went unpaid.

3.5-year feeDue August 27, 2021Paid
7.5-year feeDue August 27, 2025Not paid
11.5-year feeDue August 27, 2029Never came due

US family 2 documents, by filing date

Published applicationUS 2015/0000133 A1

METHOD FOR FABRICATING FLATTENED TUBE FINNED HEAT EXCHANGER

Filed Jan 2013 · published Jan 2015
Published application
This documentUS 9,901,966 B2

Method for fabricating flattened tube finned heat exchanger

Filed Jan 2013 · granted Feb 2018
Lapsed, fee not paid

Earlier publications, parents and continuations. None of them can still be enforced, or this patent would not be listed.

US patents it cites 0

No US citations on record.

Sources & verification

Verification

  • The USPTO Official Gazette of April 28, 2026 lists it as expired on February 27, 2026 for an unpaid maintenance fee.
  • It isn't on any reinstatement notice published since.
  • Its 1 US relative has also lapsed, expired or never issued.
  • Rechecked against USPTO records every day.
  • We check US rights only. Check foreign counterparts before selling abroad.

Confirm it yourself

  1. Open the file history on Patent Center.
  2. The status should read "Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362".
  3. Check the documents for any later petition to revive or reinstate.

Official USPTO records

USPTO Official GazetteNotice of Expiration of Patents Due to Failure to Pay Maintenance Fee, issue of April 28, 2026.Where this listing came fromMaintenance fee recordEnter the patent number to see its fee history.USPTO FeesFull published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

Cross-check elsewhere

Google PatentsWorldwide family, citing patents and legal events.patents.google.comJustia PatentsFull text, claims and classification.patents.justia.comFreePatentsOnlineFull text and PDF.freepatentsonline.comEspacenetForeign family and legal status.European Patent Office

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